Maynuo M9812 now supported

We're happy to announce that libsigrok now supports the Maynuo M9812 digital load.

The driver was contributed by Aurelien Jacobs, thanks a lot!

It was written in a pretty generic way so that it probably also supports many of the other devices in the Maynuo M97 series of devices.

If you are able to test one of the other devices in that list, please let us know!

The hardware is attached via a (virtual) serial port and communication happens via a protocol on top of Modbus RTU (as documented in the user's guide)

There are also a bunch of teardown photos (plus links to the relevant ICs and their datasheets) of the device on the wiki page, if you're interested in that kind of stuff.